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About this paper

Yu Zhou, Cheng-Fu Yang, Rui Sun, Di Wu, Sibo Peng, Mingyang Zhang, Zhen Yang, Ruiyi Zhang and 3 more

OpenVLHarness equips multimodal language models with visual and information tools, rendered tool outputs, and reusable multimodal memory, allowing them to gather and combine evidence rather than rely only on the input image. Across 22 benchmark datasets, Qwen3-VL-8B’s unweighted mean score rises from 34.24 without tools to 45.41 with the system. This is not pooled accuracy, and crowded-scene counting remains difficult.

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